Add http_content func to serve variables from HTTP @ preseed (#10801)

This imports hashicorp/packer-plugin-sdk#43

* code generate things
* update docs
* update guides
* update examples

We want to add a new guide.

builder/parallels/iso/builder.go

@@ -209,12 +209,7 @@ func (b *Builder) Run(ctx context.Context, ui packersdk.Ui, hook packersdk.Hook)
 			Directories: b.config.FloppyConfig.FloppyDirectories,
 			Label:       b.config.FloppyConfig.FloppyLabel,
 		},
-		&commonsteps.StepHTTPServer{
-			HTTPDir:     b.config.HTTPDir,
-			HTTPPortMin: b.config.HTTPPortMin,
-			HTTPPortMax: b.config.HTTPPortMax,
-			HTTPAddress: b.config.HTTPAddress,
-		},
+		commonsteps.HTTPServerFromHTTPConfig(&b.config.HTTPConfig),
 		new(stepCreateVM),
 		new(stepCreateDisk),
 		new(stepSetBootOrder),

builder/virtualbox/iso/builder.go

@@ -406,12 +406,7 @@ func (b *Builder) Run(ctx context.Context, ui packersdk.Ui, hook packersdk.Hook)
 			Label: b.config.CDConfig.CDLabel,
 		},
 		new(vboxcommon.StepHTTPIPDiscover),
-		&commonsteps.StepHTTPServer{
-			HTTPDir:     b.config.HTTPDir,
-			HTTPPortMin: b.config.HTTPPortMin,
-			HTTPPortMax: b.config.HTTPPortMax,
-			HTTPAddress: b.config.HTTPAddress,
-		},
+		commonsteps.HTTPServerFromHTTPConfig(&b.config.HTTPConfig),
 		&vboxcommon.StepSshKeyPair{
 			Debug:        b.config.PackerDebug,
 			DebugKeyPath: fmt.Sprintf("%s.pem", b.config.PackerBuildName),

builder/virtualbox/ovf/builder.go

@@ -65,12 +65,7 @@ func (b *Builder) Run(ctx context.Context, ui packersdk.Ui, hook packersdk.Hook)
 			Label: b.config.CDConfig.CDLabel,
 		},
 		new(vboxcommon.StepHTTPIPDiscover),
-		&commonsteps.StepHTTPServer{
-			HTTPDir:     b.config.HTTPDir,
-			HTTPPortMin: b.config.HTTPPortMin,
-			HTTPPortMax: b.config.HTTPPortMax,
-			HTTPAddress: b.config.HTTPAddress,
-		},
+		commonsteps.HTTPServerFromHTTPConfig(&b.config.HTTPConfig),
 		&vboxcommon.StepSshKeyPair{
 			Debug:        b.config.PackerDebug,
 			DebugKeyPath: fmt.Sprintf("%s.pem", b.config.PackerBuildName),

website/content/docs/builders/parallels/iso.mdx

@@ -146,20 +146,6 @@ can also be supplied to override the typical auto-generated key:
   \["en0", "en1", "en2", "en3", "en4", "en5", "en6", "en7", "en8", "en9",
   "ppp0", "ppp1", "ppp2"\].
 
-- `http_directory` (string) - Path to a directory to serve using an
-  HTTP server. The files in this directory will be available over HTTP that
-  will be requestable from the virtual machine. This is useful for hosting
-  kickstart files and so on. By default this is "", which means no HTTP server
-  will be started. The address and port of the HTTP server will be available
-  as variables in `boot_command`. This is covered in more detail below.
-
-- `http_port_min` and `http_port_max` (number) - These are the minimum and
-  maximum port to use for the HTTP server started to serve the
-  `http_directory`. Because Packer often runs in parallel, Packer will choose
-  a randomly available port in this range to run the HTTP server. If you want
-  to force the HTTP server to be on one port, make this minimum and maximum
-  port the same. By default the values are 8000 and 9000, respectively.
-
 - `memory` (number) - The amount of memory to use for building the VM in
   megabytes. Defaults to `512` megabytes.
 
@@ -231,6 +217,14 @@ can also be supplied to override the typical auto-generated key:
   virtual machine, without the file extension. By default this is
   "packer-BUILDNAME", where "BUILDNAME" is the name of the build.
 
+## Http directory configuration reference
+
+@include 'packer-plugin-sdk/multistep/commonsteps/HTTPConfig.mdx'
+
+### Optional:
+
+@include 'packer-plugin-sdk/multistep/commonsteps/HTTPConfig-not-required.mdx'
+
 ## Boot Command
 
 The `boot_command` configuration is very important: it specifies the keys to